function $(id) {
 return document.getElementById(id);
}
function land() {
  axios.get("/users/logins",{
      params:{
          userName:$("userName").value,
          pwd:$("pwd").value
      }
  }).then(resp =>{
      if(resp.data == "ok"){
          location.href="/html/index.html"
      }
      else {
          $("errorDiv").innerHTML="账户或密码错误"
      }
  });
}